Over subsequent centuries, many Presbyterian churches modified these prescriptions by introducing hymnody, instrumental accompaniment, and ceremonial vestments into worship. However, there is not one fixed "Presbyterian" worship style. Although there are set services for the "Lord's Day", one can find a service to be evangelical and even revivalist in tone (especially in some conservative denominations), or strongly liturgical, approximating the practices of Lutheranism or Anglicanism (especially where Scottish tradition is esteemed),[clarification needed] or semi-formal, allowing for a balance of hymns, preaching, and congregational participation (favored by probably most American Presbyterians). Most Presbyterian churches follow the traditional liturgical year and observe the traditional holidays, holy seasons, such as Advent, Christmas, Ash Wednesday, Holy Week, Easter, Pentecost, etc. They also make use of the appropriate seasonal liturgical colors, etc. Many, incorporate ancient liturgical prayers and responses into the communion services and follow a daily, seasonal, and festival lectionary. Other Presbyterians, however, such as the Reformed Presbyterians, would practice a cappella exclusive psalmody, as well as eschew the celebration of holy days.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Most Lord's Day churches observe which holidays?
Ah, so.. unanswerable

In July 2012 a United Nations Special Rapporteur called on the Tuvalu Government to develop a national water strategy to improve access to safe drinking water and sanitation. In 2012, Tuvalu developed a National Water Resources Policy under the Integrated Water Resource Management (IWRM) Project and the Pacific Adaptation to Climate Change (PACC) Project, which are sponsored by the Global Environment Fund/SOPAC. Government water planning has established a target of between 50 and 100L of water per person per day accounting for drinking water, cleaning, community and cultural activities.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What organization called for Tuvalu to  improve its water and sanitation systems?
Ah, so.. United Nations

By 1962, their Columbia Record Productions unit was operating four plants around the United States located in Los Angeles; Terre Haute, Indiana; Bridgeport, Connecticut; and Pitman, New Jersey, which manufactured records for not only Columbia's own labels, but also for independent record labels.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which company was operating five plants around the US?
Ah, so..
unanswerable